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A 50.8 kg box is resting on ahorizontal floor. A force of 250 N directed at an angle of32.6° below the horizontal isapplied to the box. The coefficient of static friction between thebox and the surface is 0.6. What is the force of friction on the box?
A chair of weight 135 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 38 directed at an angle of 42 below the horizontal and the chair slides along the floor.
suppose 20m long steel rods are used in 20m long slabs. calculate the increase of length of a slab due to this speeding 18 wheeler on this hot day
Assume a billiard ball is a solid sphere. Its radius is 3 cm and mass is 500 grams. The coefficient of static friction between the ball and the surface is .70. a) Where should you hit the ball so that it experiences pure rolling motion without the..
A person stands at a point 510m in front of the face of a sheer cliff. If the person shouts, how much time will elapse before an echo is heard? Assume normal air pressure
q1. two 75.0 w 120 rm v light bulbs are wired in series then the combination is connected to a 230 v supply. how much
A particle's trajectory is described by x=(12t3?2t2)m and y =(12t2?2t)m, What is the particle's direction of motion, measured as an angle from the x-axis, at t=5.0s
Imagine that the coefficient of kinetic friction between a certain 15kg box and the floor is 0.35. How hard would you have to push on it to move it at the constant speed of 2.6m/s across the floor.
Derive Lagrange's equation of motion for a uniform thin dizk that rolls without slipping on a horizontal plane under the influence of a horizontal force applied at its center. Determine the generalized force.
A weightlifter lifts 200kg from the floor to a height of 2m in 2s. How much work did the weightlifter perform
Waves on a 10 meter rope travel at 19 m/s. You shake the rope back and forth until you get a standing wave with a single antinode. What is the wavelength and frequency of each standing wave
1000 gallons per minute of fluid flows through a 3 inch diameter pipe. what is the average velocity of the water
Consider a bar (L=3.00m) is sliding to the right on 2 rails with a velocity (0.75 m/s) towards a resistor (20 ohms), calculate the "Magnetic Braking force"
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